VW Sharan Key Fob Failure & Starting Issues Fixed Here

Had nearly identical issues on my 2015 VW Touran 2.0 TDI. The symptoms pointed to a faulty antenna module, which handles both the radio signal and key fob frequencies. The antenna replacement was necessary because the module deteriorated over time, causing inconsistent signal reception. The main symptoms matched yours, unreliable central locking and push-button start failures. The car antenna system actually combines multiple functions into one unit, including the fm antenna and key fob signal reception. The repair involved: Testing signal strength at different points, Replacing the main antenna module behind dashboard, Recalibrating the key fob frequencies, Clearing stored error codes This was not a simple fix-it-yourself job due to the complex integration with security systems. The antenna repair required specialized diagnostic equipment to properly sync the new module with existing vehicle systems. While not a severe mechanical issue, it needed immediate attention as it affects security functions. Delaying the repair risks complete key fob failure or potential security system lockout.

Thanks for the detailed response about the antenna module replacement. You really nailed the symptoms I was experiencing with the key fob and starting issues. Did you get it fixed at a VW dealer or independent shop? Cannot seem to get a straight answer on repair costs and wondering what I should expect to pay for the antenna mount and labor. Also curious if youve had any signal issues since the repair was done. I just pulled another error code today, same one as before. Getting a bit anxious about potential security system problems if I wait too long to fix this radio signal issue. Really hoping to avoid complete key fob failure.

The automotive antenna issue was resolved at my trusted independent shop, much more cost-effective than dealer prices. Total repair came to 95€, mainly for fixing a faulty cable connection in the antenna mount assembly. No parts replacement was needed in my case. Since the repair, the car radio and key fob signals have been consistently strong. The central locking responds perfectly now, and the push-button start works every time. The error codes have stayed clear for 6 months and counting. The radio signal issues were actually simpler to fix than initially expected, just needed an experienced tech who could properly diagnose the antenna connection problem. The vehicle antenna system is working exactly as designed now, with no interference or weak spots. If your error code keeps coming back, definitely get it checked soon. These antenna-related security issues tend to worsen over time, and waiting could lead to more expensive repairs. A proper diagnostic should quickly reveal if you have the same connection problem I had or if you need a full module replacement.

Thanks for the advice. Finally got this sorted at my local VW specialist. The issue turned out to be exactly what was described, a faulty antenna module causing the key fob problems. Cost me 280€ for parts and labor, which was steep but worth it for peace of mind. The mechanic showed me where the automotive antenna was failing to transmit proper radio signal strength. They had to replace the entire module and resync everything. The car fm antenna system now works perfectly, no more issues with the doors or starting problems. The repair process took about 3 hours total. They ran full diagnostics, replaced the antenna mount and module, then did extensive testing to ensure all signals were strong. Pretty relieved to have this fixed before experiencing a complete security system failure. For anyone else facing similar problems, dont wait around hoping it will fix itself. The antenna repair was more complex than expected but solved all the issues completely. No more error codes or key fob problems since the fix.